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Table 6 Electricians versus carpenters and brick layers, Denmark, mortality rate 1987-1995, men

From: Quantification of the healthy worker effect: a nationwide cohort study among electricians in Denmark

Exposure #Death RT MR Model 1 Model 2 Model 3 Model 4
     MRR (95%CI) MRR (95%CI) MRR (95%CI) MRR (95%CI)
Not electrician 738 244,977.7 301.3 1 (ref) 1 (ref) 1 (ref) 1 (ref)
Electrician only year 0 70 13,394.7 522.6 0.99 (0.75-1.30) 1.15 (0.87-1.53) 1.39 (0.95-2.04) 1.20 (0.92-1.57)
Electrician only year 2 25 9,649.5 259.1 0.50 (0.32-0.77) 0.52 (0.33-0.81) 0.46 (0.27-0.79) 0.49 (0.32-0.76)
Electrician year 0 and 2 196 106,846.9 183.4 1.06 (0.89-1.25) 1.24 (1.04-1.48) 1.17 (0.96-1.43) 1.30 (1.11-1.53)
  1. RT, risk time - person years of risk; MR, mortality rate per 100,000 person-years; MRR, mortality rate ratio; 95%CI, 95% confidence interval.
  2. Model 1: Adjusted for age (5-year groups) and calendar year.
  3. Model 2: Adjusted for employment status, incapacity benefits, sick leave and unemployment in year 1, age (5-year groups) and calendar year.
  4. Model 3: Only persons with employment status = 1 in year 2 were included. Adjusted for employment status, incapacity benefits, sick leave and unemployment in year 1, age (5-year groups) and calendar year.
  5. Model 4: Marginal structural model with weights estimated as described in the Methods section. Adjusted for age (5-year groups) and calendar year.